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.TH speye 1 "January 1995" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
speye - sparse identity matrix
.SH CALING SEQUENCE
.nf
Isp=speye(nrows,ncols)
Isp=speye(A)
.fi
.SH PARAMETERS
.TP 8
nrows
: integer (number of rows)
.TP
ncols
: integer (number os columns)
.TP
A
: sparse matrix
.TP
sp
: sparse identity matrix
.SH DESCRIPTION
\fVIsp=speye(nrows,ncols)\fR returns a sparse identity matrix \fVIsp\fR
with \fVnrows\fR rows, \fVncols\fR columns. (Non square identity matrix
have a maximal number of ones along the main diagonal).
.LP
\fVIsp=speye(A)\fR returns a sparse identity matrix with same
dimensions as \fVA\fR. If \fV[m,n]=size(A)\fR, \fVspeye(m,n)\fR and
\fVspeye(A)\fR are equivalent. In particular \fVspeye(3)\fR is not
equivalent to \fVspeye(3,3)\fR.
.SH EXAMPLE
.nf
eye(3,3)-full(speye(3,3))
.fi
.SH SEE ALSO
sparse, full, eye, spzeros, spones
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